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9O-43 Cellular / Entertainment / Navigation / Audio:
Symptom List
Refer to a symptom diagnostic procedure from the
following list in order to diagnose the symptom:
• "Audio/Video Disc Player Adapter - Audio or Video
Inoperative or Degraded Quality: "
• "Audio Distortion - One or More Speakers"
• "Digital Radio Poor or No Reception"
• "Radio Displays LOC, LOCKED, or CODE"
• "Radio Displays CAL or CAL ERR"
• "Radio Poor Reception"
• "Reduced Volume - One or More Speakers"
• "Speakers Inoperative - One or More: "
• "Video Display is Poor or Blank: "
• "Video Entertainment System Inoperative: "
• "Video Entertainment System Remote Control
Inoperative: "
• "Video Entertainment System Wireless Headphone
Inoperative: "
Symptoms - Secondary and Configurable
Customer Controls
NOTE
1. Perform the "Diagnostic System Check -
Vehicle Diagnostic Information: " before
using the Symptom Tables in order to
verify that all of the following conditions
are true:
– There are no DTCs set.
– The control modules can communicate
via the serial data link.
2. Review the system operation in order to
familiarize yourself with the system
functions. Refer to "Steering Wheel
Controls Description and Operation".
Visual/Physical Inspection
• Inspect for aftermarket devices which may affect the
operation of the Steering Wheel Controls System.
Refer to "Checking Aftermarket Accessories: ".
• Inspect for easily accessible or visible system
components for obvious damage or conditions which
may cause the symptom.
Intermittent
Faulty electrical connections or wiring may be the cause
of intermittent conditions. Refer to "Testing for
Intermittent Conditions and Poor Connections: ".
Symptom List
Refer to "Steering Wheel Controls Inoperative" in order
to diagnose the symptom.
Audio System Troubleshooting Hints
Many conditions that affect radio operation may be
corrected without removing the radio from the car. Verify
the condition, and follow the diagnostic procedures in
order to isolate and correct the condition. In order to
properly diagnose any audio system problems, ensure
that you have a fully charged battery.
Preliminary Inspections
NOTE
When testing the audio system for poor
reception or noise, the vehicle should be
outside away from metal buildings and utility
lines, with the hood and rear compartment
closed.
• Check for any aftermarket equipment that may have
been installed on the vehicle. If aftermarket equipment
is found disconnect it and check if the audio noise is
still present.
Inspect that the antenna connector and the antenna
coaxial cable are clean and tight.
• For reception concerns, first determine if the customer
is within the listening area of the stations they are
attempting to receive.
• Stations at the lower end of the FM band are more
susceptible to audio noises than stations at the higher
end.
• If the noise is only from one speaker check for the
following before speaker replacement:
– Isolate the noise using the J 39916-A CD and
Cassette Diagnostic Audio Kit.
– Inspect the speaker connections to ensure they are
clean and tight. Refer to "Testing for Intermittent
Conditions and Poor Connections: ".
– Inspect for a loose or incorrectly installed speaker
or surrounding trim. Loose trim can cause a buzz or
flutter which sounds like a malfunctioning speaker.
• Ignition noise on the FM band may be an indication of
an ignition system problem.
• Inspect that all vehicle grounds are clean, tight and
free of corrosion.
• Inspect the rear defogger grid lines for large breaks or
dark spots.
• Inspect the connections at the radio antenna module
to ensure that they are clean and tight.
• Compare the customers vehicle to another of similar
model and audio system to determine if the condition
is abnormal.
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Troubleshooting
